arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2001.10920math.PRmath.OC
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边际约束下路径测度的最小相对熵

Minimizing relative entropy of path measures under marginal constraints

Aymeric Baradat, Christian Léonard

摘要:

我们在两个方向上研究了统计力学中薛定谔问题的推广:当密度被约束在两倍以上时,以及当粒子的初始和最终位置的联合定律被规定时。这是在协议与所谓的Brödinger问题最近推出的正则化布伦尼尔的变分模型不可压缩流体。我们恢复的Radon-Nikodym衍生物的解决方案$P$的标准分解式结果的推广相对于参考措施$R$:这个密度可以写在一个附加功能的约束时间。这项工作的特殊性是,我们把自己的情况下,当$R$是马尔可夫(或互惠),我们使用马尔可夫方法,而不是经典的凸分析参数。在这种情况下,似乎对参考度量$R$做出的自然假设是不可约类型的。

英文摘要:

We study generalizations of the Schrödinger problem in statistical mechanics in two directions: when the density is constrained at more than two times, and when the joint law of the initial and final positions for the particles is prescribed. This is done in agreement with the so-called Brödinger problem recently introduced to regularize Brenier's variational model for incompressible fluids. We recover generalizations of the standard factorization result for the Radon-Nikodym derivative of the solution $P$ with respect to the reference measure $R$: this density can be written in terms of an additive functional on the set of constrained times. The specificity of this work is that we place ourselves in the case when $R$ is Markov (or reciprocal), and that we use Markovian methods rather than classical convex analysis arguments. In this setting, it appears that a natural assumption to be made on the reference measure $R$ is of irreducibility type.

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